ICD-10 Code D83 – Common variable immunodeficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D83 – Common variable immunodeficiency
What it is
D83 identifies common variable immunodeficiency, a primary immune disorder with reduced antibody production. It is used when documentation confirms this diagnosis, including unspecified forms within the D83 category.
Clinical signs
Patients often have recurrent sinopulmonary infections, chronic diarrhea, or poor response to routine infections. Clinical features vary; refer to documentation for the specific immune deficiency pattern.
When to use this code
Use D83 when the record clearly states common variable immunodeficiency or CVID. It also applies when the provider documents a related D83 subtype and no more specific code is available.
Code from the provider’s confirmed diagnosis, not from suspicion, family history, or isolated abnormal immunoglobulin results alone. If the note is unclear, check documentation before assigning D83.
Do not use for
Do not use D83 for transient low immunoglobulins, secondary immunodeficiency, or other defined primary antibody disorders unless the provider documents CVID. Check documentation.
Coding tip
Match the code to the documented subtype first; if the chart only says “common variable immunodeficiency,” D83 is appropriate.